Check the listing for details. HMF Yamaha Grizzly 660 Slip On Exhaust Brushed + Jets (02-08). Color: Brushed Aluminum, Condition: New. Listed at 429.90 USD. Store Exhausts Bumpers About Contact HMF Yamaha Grizzly 660 Slip On Exhaust Brushed + Jets (02-08) $429.90 The HMF Performance Series has a specially designed, unrestricted core that allows the exhaust to increase power evenly throughout the entire power curve. It also features the signature HMF sound with industry-leading end cap and color options, giving you a completely custom look. Features • The Performance Series uses a 2 1/8" non-restrictive core for maximum flow. • Depending on the model, you can expect a 4-6 dB increase over stock. • The exhaust shell is made of T6061 Aluminum that weighs substantially less than stock. • **Images shown may be computer generated to reflect the color, shape, and orientation. (Typically first image) Please see Product Description and/or Part Number to ensure the desired color is selected.** • Includes a HMF Basic Jet Kit, with pre-selected jets to give your machine the proper ratio when adding a HMF exhaust. Product Details Series Performance System Slip On Material Brushed Color Brushed Aluminum End Cap Turn Down - Brushed Aluminum Fitment Year 2002-2008 Make Yamaha Model Grizzly 660 Performance Series The Performance Series from HMF has been the staple of the brand since its origin. This exhaust system has the capability of generating an even increase in horse power and torque while distributing an aggressive deep sound. 4" Aluminum Shell The Performance Series is assembled on an durable 6063-T6 aluminum alloy shell, with magnesium and silicon as the alloying elements. A high-temp powder coat can be applied for a completely custom look. Equal Power Distribution Featuring a 2 1/8" unrestricted core, the Performance Series core has a special hole pattern that allows the exhaust system to increase power evenly throughout the RPM range. Deep Trademark Sound This is the feature that sets HMF apart from any other after-market exhaust. The sound coming from the Performance Series can be described as a deep aggressive, angry tone. Let's Get Custom HMF is the leader in custom exhaust and end cap colors. Depending on the vehicle you're riding, you can select from endless color and end cap options. Store Bumpers Exhausts Grab Bars Parts Support Contact Us Warranty Information Returns & Exchanges eBay Other Items Company About HMF History Our Product